class SibraPCBExt(Cerealizable): # pragma: no cover
"""
SIBRA PCB extension. Used to attach reservation info to a PathSegment when
registering a SIBRA steady path.
"""
NAME = "SibraPCBExt"
P_CLS = P.SibraPCBExt
def __init__(self, p):
super().__init__(p)
self.info = ResvInfoSteady(p.info)
@classmethod
def from_values(cls, id_, info, sofs, up=True):
p = cls.P_CLS.new_message(id=id_, info=info.pack(), up=up)
p.init("sofs", len(sofs))
for i, sof in enumerate(sofs):
p.sofs[i] = sof.pack()
return cls(p)
def isd_as(self):
return ISD_AS(self.p.id[:ISD_AS.LEN])
def sof(self, idx):
return SibraOpaqueField(self.p.sofs[idx])
def iter_sofs(self, start=0):
for i in range(start, len(self.p.sofs)):
yield self.sof(i)
def exp_ts(self):
return self.info.exp_ts()
def sig_pack(self, ver):
b = []
if ver >= 2:
b.append(self.p.info)
b.append(self.p.up.to_bytes(1, 'big'))
for sof in self.p.sofs:
b.append(sof)
return b"".join(b)
def __str__(self):
a = []
a.append(self.short_desc())
for sof in self.iter_sofs():
a.append(" %s" % sof)
return "\n".join(a)
def short_desc(self):
a = []
a.append("%s: id: %s (owner: %s) Up? %s" %
(self.NAME, hex_str(self.p.id), self.isd_as(), self.p.up))
for line in str(self.info).splitlines():
a.append(" %s" % line)
return "\n".join(a)
def _create_info(self, inc=False):
"""
Create a reservation info block, optionally incrementing the reservation
index
"""
if inc:
self._inc_idx()
exp_tick = current_tick() + RESV_LEN
return ResvInfoSteady.from_values(
tick_to_time(exp_tick), bw_cls=self.bw, index=self.idx)
def __init__(self, p):
super().__init__(p)
self.info = ResvInfoSteady(p.info)
class SibraPCBExt(Cerealizable): # pragma: no cover
"""
SIBRA PCB extension. Used to attach reservation info to a PathSegment when
registering a SIBRA steady path.
"""
NAME = "SibraPCBExt"
P_CLS = P.SibraPCBExt
VER = len(P_CLS.schema.fields) - 1
def __init__(self, p):
super().__init__(p)
self.info = ResvInfoSteady(p.info)
@classmethod
def from_values(cls, id_, info, sofs, cons_dir=False):
p = cls.P_CLS.new_message(id=id_, info=info.pack(), cons_dir=cons_dir)
p.init("sofs", len(sofs))
for i, sof in enumerate(sofs):
p.sofs[i] = sof.pack()
return cls(p)
def isd_as(self):
return ISD_AS(self.p.id[:ISD_AS.LEN])
def sof(self, idx):
return SibraOpaqueField(self.p.sofs[idx])
def iter_sofs(self, start=0):
for i in range(start, len(self.p.sofs)):
yield self.sof(i)
def exp_ts(self):
return self.info.exp_ts()
def sig_pack3(self):
"""
Pack for signing version 3 (defined by highest field number).
"""
if self.VER != 3:
raise SCIONSigVerError(
"SibraPCBExt.sig_pack3 cannot support version %s", self.VER)
b = []
b.append(self.p.id)
b.append(self.p.info)
b.append(self.p.cons_dir.to_bytes(1, 'big'))
for sof in self.p.sofs:
b.append(sof)
return b"".join(b)
def __str__(self):
a = []
a.append(self.short_desc())
for sof in self.iter_sofs():
a.append(" %s" % sof)
return "\n".join(a)
def short_desc(self):
a = []
a.append("%s: id: %s (owner: %s) ConsDir? %s" %
(self.NAME, hex_str(self.p.id), self.isd_as(), self.p.cons_dir))
for line in str(self.info).splitlines():
a.append(" %s" % line)
return "\n".join(a)
def teardown(self): # pragma: no cover
"""Shut down the current reservation."""
# FIXME(kormat): not implemented yet in sibra state.
req_info = ResvInfoSteady.from_values(0, BWSnapshot(), 0)
self.req_block = ResvBlockSteady.from_values(req_info, self.total_hops)
self._set_size()